After removing the valve core of the bathtub faucet, you will see a circle of blue rubber at the bottom of the valve core of the bathtub faucet. Generally, the bottom of the valve core on the left is red rubber, while the valve core on the right is blue rubber.

So when changing the valve core of the bathtub faucet on the right, you still need to use the valve core with blue rubber. After installing the valve core, insert the handle and adjust the direction of the handwheel. When the handle is turned to both sides, the water is turned off, and when the person is standing, the water is turned on.

Install the screws and cover the blue cover on the right side. In this way, the valve core of the new bathtub faucet is replaced.